Fig. 9. Intracellular GSH levels (µM) measured in untreated erythrocytes or in Mg²⁺-treated erythrocytes (control), or in erythrocytes treated with 0.5 mM, or 1 mM, or 2 mM NEM with or without 10 mM Mg²⁺(10 mM Mg²⁺+ 0.5 mM NEM or 10 mM Mg²⁺+ 1 mM NEM or 10 mM Mg²⁺ + 2 mM NEM). Bars represent the mean ± SD from at least 5 experiments, 10 mM Mg²⁺ n.s. not significant versus untreated; n.s. not significant versus control, ***p<0.001 versus control; ^°°°p<0.001 versus either 0.5 mM, or 1 mM, or 2 mM NEM.